a(n) = 2*n^2 + 8*n.

Terms

a(0) =10a(1) =24a(2) =42a(3) =64a(4) =90a(5) =120a(6) =154a(7) =192a(8) =234a(9) =280a(10) =330a(11) =384a(12) =442a(13) =504a(14) =570a(15) =640a(16) =714a(17) =792a(18) =874a(19) =960a(20) =1050a(21) =1144a(22) =1242a(23) =1344a(24) =1450a(25) =1560a(26) =1674a(27) =1792a(28) =1914a(29) =2040